This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of
Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join
the discussion and see a list of open tasks.PhysicsWikipedia:WikiProject PhysicsTemplate:WikiProject Physicsphysics articles
This article is within the scope of WikiProject Technology, a collaborative effort to improve the coverage of
technology on Wikipedia. If you would like to participate, please visit the project page, where you can join
the discussion and see a list of open tasks.TechnologyWikipedia:WikiProject TechnologyTemplate:WikiProject TechnologyTechnology articles
Oppose - definitely deserves its own article in my view, there is a lot of information that could be incorporated into it, particularly from
here. I won't promise to do it myself, although I may get round to it at some point.
Mikenorton (
talk)
14:59, 1 April 2011 (UTC)reply
Oppose - I also feel that the should have its own article. Surely the article should show the standard looking diagram. Then the individual regions, along with the relavent strain rate equation should be presented.
Jrwst36 (
talk)
07:52, 8 July 2011 (UTC)reply
Deformation of elastomers
I removed "As the name implies, elastic (rubber) has a rather large elastic deformation range." from the elastic deformation section because it is questionable.
Elastomers (including rubber) clearly return to their original length after large deformations, however as stated in their article they have a very non-linear response to stress and elastic deformation is usually characterised by a linear response. I don't know enough to correct the statement but thought it should be removed until someone who does comes along.
137.205.78.240 (
talk)
11:21, 21 April 2008 (UTC)reply
elasticity is a measure of how much stress can be loaded onto a material without deforming it plastically. Since, elastomers can remain in the elastic deformation region at such large strains they are considered elastomers. The fact that their stress-strain curve is non-linear simply means that the Young's Modulus and Hooke's Law approximation does not apply to the stress-strain curve.
Summarizing, if the material can undergo high strains elastically, then it is an elastomer. The shape of the stress-strain curve has nothing to to with this.
The Lamb of God (
talk)
16:28, 15 September 2009 (UTC)reply
It would be useful if the page listed the most and least elastic materials. Whilst ceramics and crystals are listed as not very elasitic, which is the least of them all? I thought it might be diamond, but don't know if that is true. Hardness and elasticity are not the same, but I suspect there is some correlation between the two properties.
Drkirkby (
talk)
22:08, 11 June 2009 (UTC)reply
More specifically materials would be referred to by their yield strength, tensile strength, or tensile ductility.
It would be easier to correlate hardness and brittleness. The onset of plastic deformation is at the point when the yield strength is breached, any deformation before the yield strength is reached is reversible and thus elastic. Since ceramics have such incredibly high yield strengths they tend to break from their brittleness long before they undergo plastic deformation, that is that they fracture by the propagation of preexisting cracks in the crystal structure. Materials that are softer have lower yield strengths but are able to deform plastically well before they fracture.
So, for the article to state that ceramics are not very elastic is misleading, they undergo almost only elastic deformation. In fact ceramics would simply be "not very plastic", as is mentioned, they would be very hard, and thus they would be very brittle.
So, the strict, more correct correlation is the harder the material the more brittle it is. This of course does break down with some more exotic materials. I will see if I can place up a table of yield strengths.
The Lamb of God (
talk)
16:20, 15 September 2009 (UTC)reply
If Deformation in this context includes "elongation", by which I mean the engineering term, as in % elongation, then it is a fundamental mechanical engineering concept. Hardly unimportant. Materials are generally specified in tensile strength and elongation as well as hardness and others.
Wiredrabbit (
talk) —Preceding
undated comment added
22:32, 15 December 2010 (UTC).reply
Misconceptions Quote
Do we have a source for this quote? I would be interested in hearing where it came from. Otherwise, does it make sense to have it in quotes if it's just something we made up?
Practicality (
talk)
14:42, 28 January 2010 (UTC)reply
The new Ref. here is not very good here either. Especially it did not support the old text. The main part on the cited page is that glass can be very strong if it is free of surface defects.--
Ulrich67 (
talk)
20:05, 23 March 2012 (UTC)reply